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Oct. 13, 1953 c. A. BROWN MULTIPLE GASEOUS FUEL BURNER AND SECONDARY AIRFEEDBAFFLE Original Filed Dec.

' luvewrvx Reissued Oct. 13, 1953 MULTIPLE GASEOU SECONDARY AIR CharlesA. Brown, St. Louis County, Moa, as

signer, by Oil Burner ration of Missouri Original No. 2,547,850, datedApril 636,711, December N. for reissue November 6 Claims.

Matter enclosed in heavy brackets 1 appears in the S FUEL BURNER AN DFEED BAFFLE mesne' assignments, to International Company, St. Louis,Mo., a corpo- 3', 1951, Serial 22, 1945. Application 1951, Serial No.258,841

original patent but forms no part of this reissue specification; matterprinted in italics indicates the additions made by reissue.

This invention relates to multiple gaseous fuel burners of the kindcomprising a plurality of upright Bunsen type burner units adapted forassemblage in an annular series or other order of relation in a domesticfurnace or other heater. The invention has for its principal object toprovide a gaseous fuel burner of the above type with means for directingan adequate supply of secondary air along opposite sides of the burnerflames without re-circulation of combustion products around the flamesand without impingement of the flames on said means or on the furnaceparts, thereby providing complete combustion of the gas and carbonmonoxide gases. Other objects are sim plicity and economy ofconstruction and compaotness of design. The invention consists in themultiple gaseous fuel burner, in the individual burner unit and in theparts and combinations and arrangements of parts hereinafter describedand claimed.

In the accompanying drawing, which forms part of this specification andwherein like symbols refer to like parts wherever they occur,

Fig. l is a vertical sectional view through the lower portion of adomestic furnace provided with a multiple gaseous fuel burner embodyingmy invention,

Figs. 2 and 3 tional views on the lines tively, in Fig. 1,

Fig. 4 is an outside elevational view of one of the burner units; and

Fig. 5 is a central vertical sectional view on the line 5--5 in Fig. 4.

In the accompanying" drawing, my multiple gaseous fuel burner is shownmounted in an ordinary domestic heating furnace I and is supplied withgaseous fuel from a supply pipe 2 that extends horizontally into saidfurnace along the bottom thereof and terminates in an annular series ofupright branch pipes 3 provided at their upper ends with suitable jetfittings or nozzles 4. Supported on the upper ends of the supply pipebranches 3 are Bunsen type burner units comprising upright tubular bodyportions 5 that terminate at their upper ends in horizontally elongatedhollow heads 6 that are arranged in a circle and have narrow dischargeopenings 1 that extend from end to end thereof along the outer sidesthereof and are inclined upwardly and out wardly at about an angle ofdegrees above the horizontal. The upright tubular body portions 5 areenlarged horizontal cross-sec- 2-4 and 3--3, respecof the burner unitshave primary air inlet openings 8 intheir inner side walls near theirlower eliminating dangerous ends. These primary air inlet openings areprovided with pivoted valve plates for controlling the amount of airpassing through said openings into said tubular body portions. The lowerends of the bores of the tubular body portions 5 of the burner units arecounterbored to fit the upper ends of the upright supply pipe branches 3and to provide annular shoulders 9 that seat on said ends of saidbranches.

As shown in the drawing, the burner units are mounted on upright fuelsupply pipe branches 3 with their heads 6 arranged in a circle andspaced inwardly from the vertical side wall of the furnace l and. withdelivery slots or openings 1 in said heads facing outwardly and 7distance above the burner n all with the primary air inlet openings 8 atthe lower ends of said upright tubular body portions 5 of said burnerunits facing inwardly. Supported on upstanding lugs 10 provided thereforon the tops of the heads 6 of the burner units is a deflector plate Hwhich covers the space between said burner units and is spaced asuitable heads to provide horizontal secondary air passages l2 betweensaid. plate and said burner heads. As shown in the drawing, the centraldeflector plate I I, is shaped to bring the peripheral edge thereof insubstantially flush alinement with the outer sides of the burner heads6; and the lugs ill on said heads have reduced upper end portions l3that fit within vertical holes Hi provided therefor in said plate andform horizontal seats l5 for spacing said plate above said burner heads.Mounted in the furnace I between the side wall thereof and the heads 6of the circular series of burner units is an annular deflector plate l6which is supported just below the level of the mouths of the flamedischarge openings 1 in the burner heads 6 by means of inwardlyprojecting lugs I? on said wall and outstanding lugs IS on the outersides of said burner heads with its inner edge spaced outwardlytherefrom to provide vertical secondary air passages ls between saidplate and said burner heads.

By the arrangement described, gas is supplied to the lower ends of thetubular body portions 5 of the circular series of burner heads 6 fromthe upper ends of the gas supply and supporting branchpipes 3 thereforand primary air enters the air inlet openings I at the lower ends ofsaid tubular bodies and mixes with the gas flowing upwardlythe'rethrough. The mixture of primary air and gas is ignited as itissues from the discharge openings 1 and the flames are directed fromsaid opening at an upwardly and outwardly inclined angle between thevertically and horizontally spaced adjacent edges of the two deflectorplates II and IS without impinging thereon or on the furnace wall. Atthe same time, secondary air flows outwardly through the horizontalpassages I2 between the tops of the burner heads 5 and the underside ofthe central deflector plate II and along the upper sides of the upwardlyand outwardly inclined flames for the full length thereof. Secondary airalso passes upwardly through the vertical passages [9 between theannular deflector plate l8 and the outer sides of the burner heads 6 andthence upwardly and outwardly along the undersides of the inclinedburner flames. This arrangement provides an adequate supply of secondaryair to the burner flames, prevents recirculation of the combustionproducts around the burner flames and prevents impingement of the flameson furnace walls and deflector plates, thereby providing completecombustion of the gas and obtaining the maximum heating value thereofand preventing the formation of carbon monoxide gas.

Obviously, the hereinbefore described gas burner construction admits ofconsiderable modification without departing from my invention.Therefore, I do not wish-to be limited to the precise details shown anddescribed.

What I claim is:

l. A multiple gaseous fuel burner comprising a group of upstandingBunsen type burner units all having upwardly and outwardly inclinedflame openings in their outer side faces and gas and primary air inletopenings below the level of said flame openings, a deflector plateclosely adjacent and covering all of said burner units and spaced abovethe tops thereof and terminating at substantially the outer facesthereof to form therewith horizontal secondary air supply passages abovethe level of all of said flame openings, and a deflector platesurrounding said burner units and spaced horizontally from the outerside faces thereof to form therewith vertical secondary air supplypassages below the level of said flame openings, whereby the outwardflow of secondary air through said horizontal and vertical secondary airsupply passageways prevents impingement of the flames from said upwardlyand outwardly inclined flame openings on said deflector plates.

2. A multiple gaseous fuel burner comprising a group of upstandingBunsen type burner units all having upwardly and outwardly inclinedflame openings in their outer side faces and gas and primary air inletopenings below the level of said flame openings, a deflector platecovering all of said burner units and spaced above the tops thereof toform therewith horizontal secondary air supply passages above the levelof all of said flame openings, and a deflector plate surrounding saidburner units and spaced horizontally from the outer side faces thereofto form therewith vertical secondary air supply passages below the levelof said flame openings, whereby the outward flow of secondary airthrough said horizontal and vertical secondary air supply passageway isadapted to prevent impingement of the flames from said upwardly andoutwardly inclined flame openings on said deflector plates, said burnerunits having upstanding lugs at their tops arranged to position saidfirst mentioned deflector plate both vertically and horizontallyrelative to said burner units and having lugs on their outer side facesarranged to afiord support for said second mentioned deflector plate.

3. A multiple gaseous fuel burner comprising a plurality of upstandingBunsen type burner units all having horizontally elongated heads at thetops thereof arranged in a circular series, said heads having upwardlyand outwardly inclined longitudinal flame openings in their outer sidefaces, a deflector plate covering all of said burner heads and spacedabove the tops thereof, and a deflector plate surrounding said headsbelow the level of said flame openings and spaced horizontally from theouter side faces of said heads, said heads having upstanding lugsthereon arranged to position said first mentioned deflector bothhorizontally and vertically relative thereto and having lugs on theirouter side faces arranged to support said second mentioned deflectorplate.

4. A Bunsen type gaseous fuel burner com prising an upright tubularportion with gas and primary air inlet openings adjacent to the bottomthereof, a hollow horizontally elongated head at the top thereof and anupwardly inclined longitudinal flame opening in one side face of saidhead, a deflector plate supported on said head closely adjacent andcovering the burner unit and spaced above the top thereof andterminating at substantially the flame opening side face of the head toform therewith a horizontal secondary air supply passage above saidflame opening, and a deflector plate sup ported on said head spacedhorizontally from the flame opening side face of said head to formtherewith a vertical secondary air supply passage below said flameopening.

5. A multiple gaseous fuel burner adapted for arrangement within theenclosing wall of the combustion chamber of a furnace and comprising agroup of individual upstanding Bunsen type burner units each having anoutwardly directed side face having a flame discharge opening adfacentonly the upper end thereof, each burner unit having a gas and primaryair inlet thereinto at its lower end, a deflector plate substaniiallycovering the space between the rears of all of said burner units of saidgroup and with its outer peripheral edge terminating sugiciently closelyadjacent said discharge openings to form therewith horizontally directedsecondary air passages above the level of all of said dischargeopenings, and a second deflector plate encircling the outer periphery ofsaid group of burner units and of an horizontal area adapted to extendinwardly substantially from said enclosing wall of said combustionchamber and having an inner terminal edge spaced horizontally from saidunits and below said flame discharge openings to form with said burnerunits vertical secondary air supply passages that are below the level ofsaid flame openings, whereby the flow of secondary air preventsimpingement of the flames from their openings onto both of saiddeflector plates.

6. A multiple gaseous fuel burner adapted for arrangement within theenclosing wall of the combustion chamber of a furnace and comprising agroup of individual upstanding burner units each having an outwardlydirected end thereof, each said burner unit having an inlet thereinto atits lower end for gas and primary air, a substantially imperforatedeflector plate substantially covering all of the space between therears of all of said burner units and Bunsen typewith its outerperipheral edge terminating sufficiently closely ady'acent saiddischarge openings to form therewith horizontally directed secondary airpassages above the level of all of said flame openings, and a secondsubstantially imperforate deflector plate encircling the outer peripheryof said group of burner units and of an horizontal area adapted toextend inwardly substantially from said enclosing wall of saidcombustion chamber and having an inner terminal edge spaced horizontallyfrom said units and below said flame openings to form with said burnerunits vertical secondary air supply passages that are below the level ofsaid flame openings, whereby the flow of secondary air preventsimpingement of flames from their openings onto both of said deflectorplates.

CHARLES A. BROWN.

References Cited in the file of this patent or the original patenrbUNITED STATES PATENTS Number Number

